Improvement in lifting-jacks



attent @Militia AMENzo SHAVER, 0F WA Letters Patent No. 99,717,

RNERVILLE, NEW YORK.

dated February 8, 1870.

IMPROVEMENT 1N LIFTING-JACKS.

The Schedule referred to in these Letters Patent and making part of tine` same.

To all whom it 'may 'concern Be it known that I, AMENzo SHAVER, of Warner-A ville, in the 'eounty of Schoharie, and State of New York, have invented a certain new and improved Log- Lifter orJ ack; and I do hereby declare that the following` is a full, clear, and exact description ofthe construction and operation of the same, reference being lhad to the accompanying drawings, and to the marks and letters thereon, which said drawings form part ot' this specification, and represent a log-lifter lor jack, constructed under my invention- Figure 1 thereof being a side view in elevation;

Figure 2, a front view;

Figure 3, a top view; and

Figure 4, a view of the wedge, used in connection with the lifter, for raising the endI of a log or stick of timber. l

In each of these figures, where like parts are shown, like marks and letters are used to indicate the parts.

The object of this invention is to facilitate the handling or raising ot' saw-logs or timber, and placing them on the sled in vthe timber-cuttings, or on the carriage in the saw-mill.

lhis log-litter or jack has a base-piece, a, to the under side or bottom ot' which pins b are atlixcd, to give it a trxn hearing when in use.

The base-piece a is connected to a top-piece, c, by uprights d.

The uprights are lined by metal plates o, and a mctatplate, f, faces nearly the entire upper surface of the top-piece c.

Rods g bind the plate f and piece c to the base a.

Between the plates c is a travelling lever-head, h, having attached to it toothed bars i, which bars ,embrace', at their upper ends, the top-piece c and plate f, the teeth of the bars t litting ou to the notched surface j ot' the plate f.

On one end of the lever-head is a tooth, k, and to the other portion of the head a strap lits the hand-lever m.

A wedge, n, shown driven into the end of the logr in tig. 1, has a recess, o, into which the pin or tooth 'It will be iittcd when the endof the log is to be raised. l Springs p are attached to the top-piece c, as shown more fully by figs. 2 and 3, the one end, q, of the springs being turned around the pin 1', from which they may readily be liberated. `l

When it is desired to elevate the end of the log or stick of timber, the wedge n isA driven into the end of the log, and the lifter placed as shown by Itig. 1 of the drawing.

By the upward and downward movement of the 1ever, the lever-head is actuated, the toothed bars alternately rising, the tooth of one bar on the plate f alternately heilig thefulcrum ott-he other bar, and thus the end ot' the log is raised to the required eleva-tion, and thelog or stick of timber favorably placed to be loaded on the sled or saw-mill carriage.

\Vithout `the wedge. this lifter may be used as a jack for elevating any object or article to which it is suitable, as the same movements of the parts for actuating the lever-head will raise any weight not above the capacity ot' the lifteras readily as the saw-log or stick ot timber.

What I claim as my invention, and desire to secure by Letters Patent, is l f A lit'ter or jack, having a travelling lever-head, h, witlrthe toothed bars z' and springs p, arranged within and upon a frame, and operated as herein set forth.

rlhis specification signed this 13th day of December, 1869, i

, l, within which AMENZO SHAVER.

Witnesses:

MINARD HARDER, GEO. D. Hannan. 

